Needle-threading attachment for sewing-machines



(Model.) 2 Sheets-Sheet 1.y

F. G. ALTMMIN su F. POMME-R'. NEEDLE THRBADING ATTACHMENT-FOR SEWINGMACHINES. No. 1258.345. PatentedMay 23 1882.

(Model.) zsheetggsheez 22. F. G. ALTMANN 8v F. POMMER.

NEEDLE TEEEADING ATTACHMENT EOE SEWINGMAGEINES. No. 258,345. PatentedMayZB, 1882 W mmm e UNITET)l STATES PATENT OFFICE.

FRANK G. ALTMANN AND FRED POMMER, OF EDINA, MISSORI.`

`rsiEEuLE-Tl-imaaoilve ATTACHMENT Fonl SEWING-MACHINES.

SPECIFICATION forming* part of Letters Patent N0. 258,345, dated May 23,1882, if

Application filed March 4, 1882.

Toall whom it may concern Be it known that we, FRANK Gr. ALTMANN andFRED POMMER, of Edina, in the county of Knox and State of Missouri, haveinvented certain new and useful Improvements in Needle- ThreadingAttachments for Sewi ng-Machines; and we do hereby declare thattheiollowing is a full, clear, and exact description of the invention,which will enable others skilled in the art to which it appertains tomake and use the same, reference being had to the accompanyin gdrawings, which form a part of this specifica tion.

' Figure 1 is a perspective view of our improved needle-threadingdeviccfor sewin g-machines. Fig. 2 is a vertical sectional view taken throughthe needle-bar and threadingtube. Fig. 3 is a rear view of theneedle-bar, threading-tube carrier, and attachments. Fig. 4 isadetailview, in perspective, of the threading-tube and the lower end of thecarrier. Fig. 5 is a vertical sectional View through the spring-catch L.Fig.4 6 is a detail view of the cam-plate N 5 and Fig. 7 is a detailview, in perspective, of the operating Vparts of our in, vention.

Corresponding parts in the several figures are denoted by like lettersof reference.

This invention relates to needle-threading attachments forsewing-machines; and it consists in certain improvements in theconstruction ofthe same which will be hereinafter full y described, andparticularly pointed out in the claims.

-In the drawings hereto annexed, A refers to the needle-bar, which ismounted in the usual manner to slide vertically in the frame B of themachine.

C is a vertically-sliding rodJ arranged in suitable bearings in theframe B, adjoiningthe needle-bar A. The rod G has at its lowervend alaterally-proiecting arm, l), provided with a downward-projectingbracket, E, to which is hinged a frame, F, carrying'the threading-tubeG, which is preferably of 'the construction described in previouspatents to ourselves, and numbered,246,360 and 252,007, respectively.The upper end of the frame F is rounded, as shown at H, so that it willreadily enter atriangular notch, I, in a bracket, J, secured at thelower end of the frame-piece B 5 or the said (Model.)

end of frame-piece B, so as to engage the a'rm D of rod C and retain thelatter in a raised position. By pressing a stud, L, of catch K thelatter is released, and the rod C, which is provided vvith a stud orhandle, M, by which it may be conveniently manipulated, maythen4 belowered. The construction and arrange ment of the spring-catch may bemodified Without changing the spirit of our invention.

The needle-bar has upon its front side a pivoted cam-plate, N, providedwith a iinger, O, a tooth, P, and a shallow notch, Q. Said camplate isheld in its normal position by a sprm g, R, secured to the side of theneedle-bar and engaging the notch Q. Spring E has at its upper free enda rounded hook, S, capable of engaging the tooth l? of the camplate.

The threading-tube carrier G has upon its side, near the upper end, astudor pin, T, projecting through a slot, U, in, frame B, so as to becapable of engaging the finger O of camplate N. Stud T also engages apin, V, projecting laterally from the needle-bar,when the latter is in araised position and the rod O is lowered, to bring the threading-tube ina line with the eye ot' the needle. The pin V thus serves as a regulatorto stop the downward motion ot' the rod C whenn the threadingtuberegisters with the eye of the needle. To prevent the rod C from slidingdown too low when the needle-bar is lowered, it has a stud,W,

Yengaging the upper edge of the socket in which the said rod G slides.

- The operation of our invention is asfollows: The needle-bar beingbrought to its highest point,or nearly so, the catch K is disengagedfrom the rod C, which gray then be lowered. As soon as the frame F isclear vof the notchI the weight of the threading-tube causes it toassume ahorizontal position, with its front end in contact with theneedle, thus causing it to register with the needle-eye when the stud Tof rod C comes in con tact with the pin Vof the needle-bar. The needlemay now be threaded by passing the thread through the tube Gr and theeye of the needle. The rod C, with the threadingtube, is automaticallyreturned IOO to its raised position, where it is held by the catch K inthe following manner: When the machine is started and theneedle-barmovesin a downward direction the tingerOof cam-plate N strikes the studT of rod C, which,being stationary, causes the oam-plate to move uponits pivot until the tooth P engages the hook S of spring R. In thisposition it remains on the upward stroke of the needle-bar, thus causingthe finger O to engage the underside of stud T of rod G, which isthereby lifted until said rod reaches itsnormal position, where itisheld by catch K. Frame F at the same time engages the triangular notchI, thus causing thethreading-tube `to swing outward from theneedleinto adiagonal position, where it cannot interfere with the operation oftheneedle-bar, and where it forms anincliued guide for the thread, whichpasses 'through it to the needle. The needlebar in the meantimecontinues its upward course, when the linger O will bear upon theunderside of stud T with sufficient pressure to disengage thespring-hook R S from the tooth P and turn the cam-plate N upon its pivotuntil it resumes its normal position, with the springR engaging theshallow notch Q.

We would have it understood that, without changing thespirit of ourinvention, the camplate N,with its attachments, may be mounted upon therod C, the stud T of which is then transferred to the needle-bar. Theslight 'modications in construction which lbecome necessary by suchinterchange of parts will readily suggest themselves to a skilledmechanic.

Having thus described our invention, We claim and desire to secure byLetters Patent of the United States- 1. In aneedle-threadingattachmentfor sewing-machines, the sliding rod C,carrying the hinged frame F, beveled at H, and havingthe threading-tubeGr, in combination With the bracket J, having notch I, as and for thepurpose set forth. t

2. The threading-tube carrier C, having pin or stud T,in combinationwith the needle-bar A, having pin V, as and for the purpose set forth.

3. The needle-bar A, having pivoted caniplate N, provided with the ngerO, tooth P, and shallow notch Q, spring R, having hook S, and pin V, incombination with the threadingtube carrier C, having pin or stud T, asand for the purpose set forth.

In testimony that we claim the foregoing as y t

